結果:

One community within MathWorks that has been helping students continue their learning is MATLAB Student Ambassadors. Despite new challenges with transitioning to distance learning, student ambassadors have done a truly amazing job. In a blog that was published recently, I discuss 3 examples of the great things that our student ambassadors have done to aid distance learning. Click here to read the blog. I hope after reading this blog you share my level of admiration for these students.

Student Ambassador at University of Houston hosting a fun and informative virtual event.

hi how to apply single stream into multiple channels in fft simulink simulation from workspace

Sir how can we use Image processing in the Distance Learning

Hi, Currently modelling an reciprocating engine coupled to a linear PMSM motor/generator for my PhD. I have downloaded the "Model File Package for Motor Control Design Public Video" simulink model.

Is it possible to convert to rotational PMSM simscape plant model used for a linear PMSM model? As there are none in the library to just drag into the existing control model.

Any ideas i can represent a linear motor based on this existing control model?

My output from the machine needs to be linear position w.r.t, with a total stroke of approximately 100 mm. Can i convert the rotational constant speed input at port "W" to a sinusoidal velocity profile (such that it replicates the velocity profile of a linear machine)?

Any help would be great.

Thanks

Professor Martin Trauth has shared lots of teaching resources on his MATLAB Recipes for Earth Sciences site. Now with the changes created by COVID, he's shifting his courses to online, including at-home phone-based data collection. Read how he's doing this and find additional resources: Teaching Data Analysis with MATLAB in COVID-19 Times (Trauth, Potsdam)

A common question you may have when integrating MATLAB Grader into your LMS using the LTI standard is what information is being sent to MATLAB Grader from your LMS?

First, please familiarize yourself with the LTI specification on the IMS Global website: http://www.imsglobal.org/specs/ltiv1p1/implementation-guide

Next, take a look at the documentation we provide on LMS integration that is specific to your platform/vendor: https://www.mathworks.com/help/matlabgrader/lms-integration.html

MathWorks does not require personally identifiable information. More specifically, here are the standard LTI fields that we DO NOT want nor collect, as opposed to what fields we DO collect.

We do NOT want your LMS to send us: - user_image - lis_person_name_given - lis_person_name_family - lis_person_name_full - lis_person_contact_email

We DO require from your LMS: - roles

The other LTI fields listed in the specification are not related to personally identifiable information, and may be required for the LTI session to be launched successfully. For further questions about what is contained in the LTI specification, please refer to the specification and implementation guide provided by IMS, or contact the vendor of your LMS.

can anyone advise which Matlab code I can add to the below codes to have Spectrogram Plot?

OptimalValuesx1y1z1 = [dataArray{1:end-1}];
%% Clear temporary variables
clearvars filename delimiter formatSpec fileID dataArray ans;

re=1;
fs=20e3/re;
datatable=OptimalValuesx1y1z1;
datatable=resample(OptimalValuesx1y1z1,1,re);
%datatable=lowpass(OptimalValuesx1y1z1,10,fs);
datatable(:,2)=datatable(:,2).*0.01;

figure
t=1/fs:1/fs:length(datatable)/fs;
plot(t, rms(datatable(:,2:4)*9.81,3));

ylim([0 10])  
xlim([0 10])
%ylim([0 1])
hold on
%plot(t,ones(1,length(datatable(:,2:4)*9.81))*12,'r--')
xlabel('Time [s]')
ylabel('Amplitude [m/s^2]')
legend('axis X','axis Y','axis Z','limit')

out_mean = mean(rms(datatable(:,2:4),3))
std_mean = std(rms(datatable(:,2:4),3))

% %PSD analysis
figure
x=datatable(:,2:4)*9.81;
nbar = 4;
sll = -30;
win = taylorwin(length(x),nbar,sll);
periodogram(x,win,[],fs);
xlim([0 1.624])
legend('axis X','axis Y','axis Z')

plz tell me the web site where i can easily install mathlab.

I want to use the Image fusions and deep neural network to detect the Corona-virus (COVID-19)

Hello, I want to generate Sinusoidal PWM for 3 level inverter. But I can not finding the way of connect these blocks togather. Is it possible to conenct them? Is there any other way to generate SPWM in simulink?

Hello everyone! I'm trying to find an optimal placement for a recloser using the optimization toolbox. The best place to set a recloser is defined by minimal SAIFI (system average interruption frequency index) value. I've created a little function where Nt - total number of customers, G - are some weights characterizing power lines, Xi - number of interrupted customers (if interruption happens in i-th line AND it has a recloser in it), Mi - row of 1 and 0 (that genetic algorithm should use as a gene I guess...) Here's the code of function:

function [S] = SAIFI_sum (M)
Nt=270;
G = [1.1 1.2 1.3 1.4 1.5 1.6];
X = [270 30 220 180 60 70];
  for i=1:length(M)
      if  M(i)== 1
      N(i) = X(i);
  else
          N(i) = Nt;
      end
  end
  S = 0;
  for j=1:length(M)
      SAIFI(j) = N(j)*G(j);
      S = S + SAIFI(j);
  end
   S
end
As a result I have 51 same results: S = 297 and following message:
"Optimization running.
Objective function value: 297.0
Optimization terminated: average change in the fitness value less than options.FunctionTolerance".
I couldn't understand how to solve this problem.

Created and tested in the university classroom, the Introduction to MATLAB zyBook includes automated assessment using MATLAB Grader. Learn how to create custom MATLAB assignments using zyLabs and provide feedback.

Join this webinar running April 21st and 23rd

Here is a great video from Gartner in response to COVID-19 and trends they are seeing for schools transitioning to Distance Learning. We hope this is helpful! See here: Gartner Research

I organized in September 2019 a one-week workshop in a hybrid set-up (students could attend the workshop either on-site or fully on-line). Beyond the hybrid nature of the workshop, the workshop was "flipped": the workshop attendees had to study some handbook specifically written for the workshop, watch some short videos summarizing the main concepts and answer online quizzes. During the workshop, most of the time was spent on hands-on coding exercises and assignments, during which the workshop attendees had to apply the concepts presented in the handbook and videos.

All coding exercises and assignments were carried out with MATLAB Grader. The platform provided the same coding environment to all workshop attendees, irrespective of whether they attended the workshop on-site or remotely. Furthermore, by providing a coding template and rigorous assessment tests along each exercise, having all students converging to the right "solution" was painless. It allowed me, as a teacher, to entirely focus on helping the students in solving those exercises, which was extremely rewarding.

This teaching set-up, combined with smart IT solutions as e.g MATLAB Grader, favors deep student learning, since the students learn by doing (active learning) and are continuously supported by the teacher in their learning.

I will soon teach in another course along the same principles. The course was supposed to be given on-site only, but because of the outbreak of Covid-19, it will be given entirely online. Thanks to MATLAB Grader, the migration to a online set-up is straightforward.

In case you want to read more about some of my past efforts in the development and application of student-centred pedagogical approaches, you can read more about those at: https://www.chalmers.se/en/departments/physics/news/Pages/Teaching-the-algorithms-that-are-crucial-for-nuclear-reactor-modelling.aspx and https://www.chalmers.se/en/departments/physics/news/Pages/Online-educational-efforts-to-ensure-nuclear-safety.aspx

I will also be glad to answer questions and provide help to those of you who want to get started with online teaching.

Christophe

This Coursera course teaches computer programming to those with little to no previous experience: https://www.coursera.org/learn/matlab

Your students might find this course a useful introduction to programming.

I took a course on Medical Image Processing from one of the instructors, Prof Mike Fitzpatrick, when I was a graduate student at Vanderbilt University a few decades ago. He's a great instructor who helped get me hooked on MATLAB for learning, teaching and researching!

There’s a webinar on online learning tools with MATLAB this Friday. It’s for time zones in Asia Pacific.

Register if you’re interested!

Hi I want to track a animal in my recorded video. I tried computer vision toolbox but it is not very accurate for this type of tracking. The recording is from top and the animal runs in a maze. I want to track body and head. The next step is classifying the movements in video using deep learning but again we do not have a trained network.

iam working with rgb fundus images my task is to convert the rgb image to hsv space and extract the channels and perform brightness correction in the image now i am little confused on how to extract the channels of the corrected image the corrected image is not saved as jpg format could anyone help me to solve this issue i have also attached the coding thank you in advance